Resumen: Three lambs from different mothers, aged between 2 and 3 days, were referred to the diagnostic laboratory for postmortem examination. The animals were found dead on the premises in the early morning, and it is suspected that they died during the night. These cases were presented at a semi-extensive meat production farm with around 800 Lacaune-breed ewes in the Spanish Pyrenees mountains. The ewes are housed during lactation, which lasts about 40 days. During this time, they are fed hay and commercial concentrate. For the rest of the time, the animals graze on native pastures. During the mating season, they receive mineral supplementation. The animals were fed turnips during the mating season and early gestation. Although the number of affected animals remains unknown, there was a significant outbreak in which animals were born alive but weak and died within hours of parturition. Idioma: Alemán DOI: 10.2460/javma.25.03.0150 Año: 2025 Publicado en: Journal of the American Veterinary Medical Association 263, 8 (2025), 1049-1051 ISSN: 0003-1488 Tipo y forma: Article (Published version) Área (Departamento): Área Sanidad Animal (Dpto. Patología Animal) Área (Departamento): Área Medicina y Cirugía Animal (Dpto. Patología Animal)